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About the ProjectTowering above the Dubai skyline, the Burj Khalifa is symbolic of the city’s emergence as one of the world’s top business and tourist destinations. The magnificent tower houses residences, a hotel and various commercial spaces, but its most popular attractions are the two observation decks located at the 124th and 148th floors. For visitors, the enthralling experience of visiting At The Top starts right from the moment they start to queue up to book their tickets. An extraordinary union of tasteful design, precision engineering and meticulous craftsmanship, the entrance lobby to the observation deck was created to give visitors a small glimpse of the beauty that awaits them a hundred storeys higher.The ChallengeWhile procuring the glass for the lobby to Dubai’s most well-known tourist attraction, we left no stone unturned in sourcing the highest grade materials. The customer had very specific needs regarding the colour of the panels. Achieving the right PVB colour combination was one of the biggest challenges we faced on this project. Further, we had to ensure that the glass used was durable and the coloured films did not fade over time. Working with Seele proved to be both demanding and rewarding. The company, known for developing Apple stores across the world, wanted to inspect every single pane of glass so that it met their high quality requirements. 

When a homeowner is considering the purchase of a steel roof a common question is whether it will increase the risk of a lightning strike. After all, steel is highly conductive, just like the materials used in lightning rods, so doesn’t it stand to reason that the steel roof will attract lightning? The short answer is, NO, steel roofing will NOT increase the risk of a lightning strike in any way. For all intents and purposes, nothing ‘attracts’ lightning. Lightning occurs on too large of a scale to be influenced by small objects on the ground, including steel roofs. The location of the thunderstorm overhead alone determines where lightning will hit the ground. A lightning bolt that is several miles long, generated by a cloud that is more than 6 to 10 miles high, is not going to be influenced by an object the size of your house. 652 Bishop St. N., Unit 2A, Cambridge, Ontario N3H 4V6 • Tel.: (519) 650-1285 • Fax: (519) 650-8081 • www.cssbi.ca The descending stepped leader of a lightning bolt doesn’t ‘decide what to strike’ until it is very close to the ground. When a cloud-to-ground lightning channel is forming, it is going to strike the ground where the opposing charges are greatest, directly underneath the storm’s most electrically active region. If you are standing at that exact location, you will be hit, even if there’s no metal within miles! Conversely, if you are farther than 500 feet from that location, you could wave your golf club or umbrella high in the air, but you won’t draw the lightning away, even slightly, from striking where it’s going to strike. Steel does conduct electricity, but steel roofs don’t attract lightning or increase the probability of a lightning strike. Four factors affect the probability of a lightning strike: • Topography: a structure located on a mountain or hill has a higher probability of a strike than one in a field. • Structure size and height: a tall structure or one that covers a great deal of ground has a higher probability of a strike than a short or small building. • Relative location in relation to taller structures: a small, short building near a taller structure has a lower probability of strike than the taller structure. • Severity and frequency of thunderstorms in the structure’s vicinity. However, on occasion, lightning does strike a house. If your home were hit, the steel roofing would disperse the energy safely through the structure. Since steel roofing isn’t combustible or flammable, it’s a low risk and desirable roofing option where severe weather is concerned -- especially for lightning. For More Information For additional information on steel roofing or other sheet steel building products, visit our website at www.cssbi.ca.

One of the highlights of the SUNY University Hospital’s vertical expansion is the addition of the Golisano Children’s Hospital on the top two floors of the six-story addition. Since the project added new floors, stairwell enclosures were also added. Traditionally, stairwells are relegated to the back of the building, and are usually closed-off, dimly lit and seldom used. Today, stairwells are becoming a prominent design feature and their use is encouraged more and more for the health benefits that stair climbing provides.

Pressure marking, also known as pressure mottling or imprinting, is an uneven or irregular gloss pattern on the face of a prepainted sheet steel. The photograph in Figure 1 shows what pressure marking looks like. The mottled appearance takes place when the gloss components in the prepainted top coat are compressed or flattened during the manufacturing and coiling process. The condition is more prevalent on dark colours and high gloss products. Pressure marking is also typically noted in the centre of the strip where the coiled product is under the most pressure

Four Key Components Constitute Prefinished Sheet Steel Prefinished sheet steel for construction consists of four major components: the sheet steel itself, a metallic (zinc or aluminum-zinc alloy) coating, chemical pre-treatment and primer, and a top coat. Each performs an important role in providing designers with a high quality, aesthetic, cost competitive and corrosion-resistant material. The backbone of the system is sheet steel, an ideal material for covering large surface areas because of its economy and high strength-toweight ratio. Protection against the demanding Canadian environment is provided by the metallic coating, one of the most effective methods of protecting bare steel from corrosion. Both zinc and aluminum-zinc alloy provide a tough, non-porous coating

Buildings have a profound impact on our natural environment, economy, health and productivity. In North America, the built environment accounts for approximately one-third of all greenhouse gas emissions, energy, water and material consumption and generates similiar proportions of pollution. Indoor air quality is regarded as one of the top environmental health risks today, affecting the well-being, productivity and performance of many people. As concerns increase about sustainability in building design and operation, there is a need to develop a framework for assessing and quantifying buildings so that questions such as, “What is sustainable design?” and “How green is this project?” can be addressed. In response to this, the Leadership in Energy and Environmental Design (LEED) green building rating system was developed to provide such a framework for North America. This document explores how the use of steel structures and components can contribute to achieving a LEED certificate for a building.